DATE: AUGUST 19, 2026
TO: CHAIRPERSON AND MEMBERS OF THE PLANNING COMMISSION
FROM: ANDREA GILBERT, CITY PLANNER
RECOMMENDATION
title
Adopt Planning Commission Resolution No. PC2026-024 determining the easements from the Army Corps of Engineers (ACOE) to the Orange County Flood Control District (OCFCD) at the Adobe Dike (APN: 1033-082-05 & 06 and 1033-091-02) conforms to the City of Chino General Plan.
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BACKGROUND
The Yorba-Slaughter Adobe Dike Project (Adobe Dike) was constructed to reduce flood risk to the Yorba-Slaughter Adobe Museum, located at 17127 Pomona Rincon Road, as part of the Santa Ana River Mainstem (SARM) project. The United States Army Corps of Engineers (USACE) raised the existing Prado Dam and plans to raise the existing spillway. The standard project flood (SPF) (566.0 feet NGVD29) would impact the Yorba-Slaughter Adobe Museum. The Adobe Dike, located mostly on existing reservoir land, will protect the low-lying areas below elevation 566.0 feet NGVD29.
Construction of the Adobe Dike was completed in 2017 and turned over from USACE to the Orange County Flood Control District (OCFCD) for maintenance in July of 2025. While the dike was constructed on OCFCD-owned parcels, there are segments of the two access roads connecting from Pomona Rincon Road that are on USACE property. USACE will be conveying an easement to OCFCD for these access road segments.
Additionally, USACE will include in the easement a portion of land adjacent to Pomona Rincon Road for the installation of security fencing to secure the perimeter of the dike.
ISSUES AND ANALYSIS
The Adobe Dike is located at 17127 Pomona Rincon Road (see attached Exhibit “A”). The General Plan land use designation is Recreation/Open Space (R/OS), which is primarily intended for areas of outdoor recreation and the preservation of natural resources. The existing zoning for the property is identified as OS2 (Open Space Natural), which is consistent with the General Plan land use designation by providing a district with minimal or no development to serve as visual buffers, natural open and wildlife corridors and water recharge and detention/retention areas.
The Adobe Dike is located within the flood inundation area for the Prado Dam. Both the USACE and OCFCD own the majority of properties within the flood inundation area, which is intended to provide capacity for the Prado Dam in the event of large rain events in order to project properties downstream from the Dam. Acquisition of easements for long term access and maintenance at the Adobe Dike is consistent the City’s General Plan land use goals.
ENVIRONMENTAL REVIEW
A finding of conformity with the General Plan is not a project for purposes of CEQA and, therefore, is not subject to environmental review. (CEQA Guidelines Section 15060(c)(3), 15378).
Attachment: Resolution PC2026-024
Exhibit A - Location Map